For anyone actually interested in Game Boy music, I would recommend the LSDJ software, which is a music production tool that runs on an actual Game Boy (or emulator). You can get much nicer results than this vibe-coded slop that feels insulting to the craft. It's not even that hard to do, if you just want to remix existing songs and have the sheet music/MIDI on hand (which this requires anyways) a song can be transcribed in just a couple of hours.

Addendum - I thought I should add some links to my favorite LSDJ artist as a demonstration of what can be done with it:

[1] https://www.youtube.com/watch?v=-yGcLUBjiKk

[2] https://www.youtube.com/watch?v=9Ov4KE_M2Qc

[3] https://www.youtube.com/watch?v=RgdPU5O_1RM